World Journal of Dentistry

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VOLUME 6 , ISSUE 3 ( July-September, 2015 ) > List of Articles

RESEARCH ARTICLE

Cone-beam Computed Tomographic Analysis: Comparison of the Efficacy of Two Rotary Retreatment Systems for Removal of Filling Material from Primary Teeth Obturated with Contemporary Endodontic Sealers

Carlos Rocha Gomes Torres, Eduardo Galera da Silva, Ana Paula Martins Gomes, Camila Said Moreira, Frederico Canato Martinho, Marcella Pavanello Batista Coelho, Luis Roberto Manhães Coutinho Júnior

Citation Information : Torres CR, da Silva EG, Gomes AP, Moreira CS, Martinho FC, Coelho MP, Júnior LR. Cone-beam Computed Tomographic Analysis: Comparison of the Efficacy of Two Rotary Retreatment Systems for Removal of Filling Material from Primary Teeth Obturated with Contemporary Endodontic Sealers. World J Dent 2015; 6 (3):129-137.

DOI: 10.5005/jp-journals-10015-1328

Published Online: 01-09-2015

Copyright Statement:  Copyright © 2015; The Author(s).


Abstract

Introduction

This study has used cone-beam computed tomography (CBCT) to evaluate the efficacy of two different nickel titanium (NiTi) rotary retreatment systems for removal of filling material from teeth obturated with contemporary endodontic sealers. The operative time required for removal of root filling materials was also evaluated.

Methods

Sixty root canals were randomly divided into three groups according to the sealer used for obturation: AH Plus Jet, mineral trioxide aggregate (MTA) Fillapex, and RoekoSeal Automix (RSA) (all, n = 20). After obturation, each group was subdivided into two subgroups according to the NiTi retreatment rotary system: Mtwo retreatment (Mtwo-R) file subgroup and ProTaper-UR subgroup—both instrumented with Mtwo-R files. Teeth were scanned with a microcomputed tomography before and after obturation.

Results

Residual filling material was observed in 100% of the specimens after retreatment. No difference was found between Mtwo-R and ProTaper-UR systems (p > 0.05). The RSA was more effectively removed from dentin walls than AH Plus Jet (p < 0.05), with no difference to MTA Fillapex (p > 0.05). Thus, teeth obturated with RSA required less operative time to be retreated (both, p<0.05).

Conclusion

ProTaper-UR and Mtwo-R systems were effective in removing the filling materials after instrumentation, but they could not eliminate them completely. Moreover, teeth obturated with silicone-based sealer RSA showed less residual filling material in dentin walls compared to the epoxy resin-based sealer (AH Plus Jet), which exhibited no difference compared to the salicylate resin-based sealer (MTA Fillapex). Teeth obturated with silicon-based sealer also required less operative time to be retreated despite the NiTi rotary retreatment system tested.

How to cite this article

Moreira CS, Martinho FC, Coelho MPB, Júnior LRMC, da Silva EG, Torres CRG, Gomes APM. Cone-beam Computed Tomographic Analysis: Comparison of the Efficacy of Two Rotary Retreatment Systems for Removal of Filling Material from Primary Teeth Obturated with Contemporary Endodontic Sealers. World J Dent 2015;6(3):129-137.


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  1. Comparison between gutta-percha and Resilon removal using two different techniques in endodontic retreatment. J Endod 2006;32:362-364.
  2. Efficacy of different rotary instruments for guttapercha removal in root canal retreatment. J Endod 2006; 32:469-472.
  3. Efficacy of ProTaper Universal rotary retreatment system for gutta-percha removal from root canals. Int Endod J 2008;41:288-295.
  4. Efficacy of ProTaper retreatment files in removing filling materials during root canal retreatment. J Endod 2008;34:1381-1384.
  5. Three-dimensional evaluation of effectiveness of hand and rotary instrumentation for retreatment of canals filled with different materials. J Endod 2008;34:1370-1373.
  6. Efficacy of ProTaper retreatment system in root canals filled with gutta-percha and two endodontic sealers. J Endod 2008; 34:1223-1235.
  7. The effectiveness of manual and mechanical instrumentation for the retreatment of three different root canal filling materials. J Endod 2008;34:466-469.
  8. In vitro evaluation of the effectiveness of ProTaper universal rotary retreatment System for guttapercha removal with or without a solvent. J Endod 2009;35: 1580-1583.
  9. Removing root canal obturation materials: a comparison of rotary file systems and re-treatment agents. J Am Dent Assoc 2009;140:680-688.
  10. Heat release, time required, and cleaning ability of MTwo R and ProTaper universal retreatment systems in the removal of filling material. J Endod 2010;36:1870-1873.
  11. Efficacy of five rotary systems versus manual instrumentation during endodontic retreatment. Braz Dent J 2011;22:294-298.
  12. Efficacy of three different rotary files to remove gutta-percha and Resilon from root canals. Int Endod J 2010;43:1022-1028.
  13. Efficacy of ProTaper retreatment system in root canals obturated with gutta-percha using two different sealers and guttaflow. Int J Dent 2011;2011:1-5.
  14. Efficacy of rotary NiTi retreatment systems in root canals filled with a new warm vertical compaction technique. Dent Mater J 2011;36:948-953.
  15. The efficacy of two rotary NiTi instruments and H-files to remove gutta-percha from root canals. Med Oral Patol Oral Cir Bucal 2012;17: 506-511.
  16. The efficacy of ProTaper universal rotary retreatment instrumentation to remove single gutta-percha cones cemented with several endodontic sealers. Int Endod J 2012;45:756-762.
  17. The efficacy of five techniques for removing root filling material: microscopic versus radiographic evaluation. Int Endod J 2012;45:35-41.
  18. Efficacy of ProTaper rotary retreatment system for gutta-percha removal from oval root canals: a micro-computed tomography study. J Endod 2012;38:1516-1520.
  19. Efficacy of two NiTi systems and hand files for removing gutta-percha from root canals. Int Endod J 2012;45:1-6.
  20. Residual filling material in dentinal tubules after gutta-percha removal observed with scanning electron microscopy. J Endod 2012;38:293-296.
  21. Efficacy of D-race and ProTaper universal retreatment NiTi instruments and hand files in removing gutta-percha from curved root canals–a micro-computed tomography study. Int Endod J 2011;45:580-589.
  22. Effectiveness of ProTaper universal retreatment instruments used with rotary or reciprocating adaptive motion in the removal of root canal filling material. Int Endod J 2014; in press.
  23. Penetration of dentinal tubules by endodontic sealer cements in extracted teeth and in vivo. Int Endod J 2007;40:873-881.
  24. Toxicity evaluation of root canal sealers in vitro. Int Endod J 2008;41: 72-77.
  25. Cytotoxicity of 5 endodontic sealers on L929 cell line and human dental pulp cells. Int Endod J 2011;44:626-634.
  26. Long-term cytotoxic effects of contemporary root canal sealers. J Appl Oral Sci 2013;21:43-47.
  27. Regaining apical patency after obturation with gutta-percha and a sealer containing mineral trioxide aggregate. J Endod 2014;40:588-590.
  28. Antibacterial activity of two MTAbased root canal sealers. Int Endod J 2011;44:1128-1133.
  29. Cytotoxicity evaluation of a new resin-based hybrid root canal sealer: an in vitro Study. J Endod 2014;40:124-128.
  30. Threedimensional analysis of root canal geometry by high-resolution computed tomography. J Dent Res 2000;79:1405-1409.
  31. Preparation of oval-shaped root canals in mandibular molars using nickeltitanium rotary instruments: a micro-computed tomography study. J Endod 2010;36:703-707.
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